Ubuntu 20.04 network interfaces

Is there any way to change configuration of IP address like in old distribution like 17.10 and 11.04. For example I've changed Ip address in /etc/network/interfaces but in 20.04 it's impossible to do this way and netplan is not easy to use.

1 Answer

Yes, things change and systemd has taken control over many parts of linux. If you wnat a static ip for your device create a file with sudo:

/etc/systemd/network/myconnection.network
[Match]
Name=enp0s25 #check your interfaces for this name
[Network]
DNS=10.10.0.3 #DNS, it may be like the gateway
Address=10.10.0.10/24 #the ip address of your device
Gateway=10.10.0.1 #your router

I've commented the entries (I assumed that your local gateway is 10.10.0.1 - you must use yours of course)

That done the systemd service has to be enabled:

systemctl enable systemd-networkd
systemctl start systemd-networkd

Now you are set. The "enabled" keyword ensures, that the service will be started after a reboot, the "start" does it (once) immediately

You can check if everthing works with networkctl status enp0s25whereas your netwrok device may differ. The name of your device can be checked with:

ip a